US10767311B2ActiveUtilityA1

Fibrous substrate for producing a porous coating base paper or prepreg, and method for the production thereof

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Assignee: SCHATTDECOR AGPriority: Jun 3, 2015Filed: Jun 3, 2016Granted: Sep 8, 2020
Est. expiryJun 3, 2035(~8.9 yrs left)· nominal 20-yr term from priority
Inventors:Dieter WaleschTanja ZimmermannGilberto SiqueiraSebastien Josset
D21H 17/675D21H 27/26D21H 17/67D21H 11/18
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Cited by
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References
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Claims

Abstract

A fibrous substrate material for producing a porous coating base paper or prepreg comprises a planar impregnatable structure made of cellulose fibers, which contains at least one pigment species and optionally contains further additives conventional for paper. The cellulose fibers contain a proportion of 1 to 20 wt.-% of nanofibrillated cellulose (NFC). A method for producing the fibrous substrate material comprises the steps of: providing an aqueous suspension containing a cellulose containing material and an admixture of said pigment species and, optionally, further additives conventional for paper, sheet forming, drying. The cellulose containing material contains a proportion of 1 to 20 wt.-% of NFC with a specific surface (SSA) of at least 125 m 2 /g.

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
       1. A fibrous substrate material for producing a porous coating base paper or prepreg, comprising:
 a planar impregnatable structure made of cellulose fibers, which contains at least one pigment species and which optionally contains further additives conventional for paper, wherein 
 the cellulose fibers contain a proportion of 1 to 20 wt.-% of nanofibrillated cellulose (NFC) with a specific surface (SSA) of at least 125 m 2 /g, wherein the fibrous substrate material is single-layered. 
 
     
     
       2. The fibrous substrate material according to  claim 1 , wherein the NFC portion is 5 to 10 wt.-%. 
     
     
       3. The fibrous substrate material according to  claim 1 , wherein the said pigment species is titanium dioxide. 
     
     
       4. The fibrous substrate material according to  claim 1 , wherein the said pigment species is iron oxide. 
     
     
       5. The fibrous substrate material according to  claim 2 , wherein the said pigment species is titanium dioxide. 
     
     
       6. The fibrous substrate material according to  claim 2 , wherein the said pigment species is iron oxide. 
     
     
       7. The fibrous substrate material according to  claim 1 , wherein the SSA of the NFC is at least 175 m 2 /g.

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